Wet-dry joint cooling system model and its partial variable work condition properties

LI Yinghui; WEI Hongqi; WANG Lili; HAN Guoqing

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Wet-dry joint cooling system model and its partial variable work condition properties

更新时间：2025-09-28

- Wet-dry joint cooling system model and its partial variable work condition properties
- Thermal Power Generation Vol. 43, Issue 4, Pages: 82-86(2014)
- 作者机构：
  
  1. 东南大学能源与环境学院
  2. 南京博沃科技发展有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2014
- 稿件说明：
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LI Yinghui, WEI Hongqi, WANG Lili, et al. Wet-dry joint cooling system model and its partial variable work condition properties[J]. Thermal power generation, 2014, 43(4): 82-86.
DOI：

LI Yinghui, WEI Hongqi, WANG Lili, et al. Wet-dry joint cooling system model and its partial variable work condition properties[J]. Thermal power generation, 2014, 43(4): 82-86. DOI：

摘要

针对某300MW直接空冷机组夏季汽轮机排汽压力过高的问题

建立了分建式干湿联合冷却系统及其计算模型

在主蒸汽流量分别为700、900t/h时

对采用直接空气冷却系统和干湿联合冷却系统机组的汽轮机排汽压力及净发电功率随环境干球温度的变化情况进行了分析

结果表明:干湿联合冷却系统的性能受环境干球温度的影响远小于直接空气冷却系统;在高环境干球温度下

干湿联合冷却系统的经济性和稳定性均优于直接空气冷却系统;在主蒸汽流量为700t/h

环境干球温度高于10℃时

采用干湿联合冷却系统较为适宜

而在主蒸汽流量为900t/h

环境干球温度高于5℃时

关闭湿式冷却系统较为经济。

Abstract

In allusion to high back pressure of a 300MW direct air cooling unit in summer

the wetdry joint cooling system was established and its calculation model was built.The influence of ambient temperature on back pressure and net power of both air cooling system and wet-dry joint cooling system under THA load and 75%load in sliding pressure condition was investigated and compared.The results indicated that

the wet-dry joint cooling system was less sensitive to the ambient temperature

and it showed better economy and stability.For this 300MW unit

when the main steam flow was 700t/h and the ambient dry bulb temperature was higher than 10 ℃

the wet-dry joint cooling system was suitable

while the when the main steam flow was 900t/h and the ambient dry bulb temperature was lower than 5 ℃

it was economic to shut down the wet cooling system.

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